Hello,

I just purchased a new Dell S2417DG monitor:
Manufactured date: October 31, 2016
S/N: CN-0VGGY4-74261-6AV-0LNU-A00
Operating System: Windows 10, 64-bit (two systems, same OS)
GFX on System #1: Nvidia GTX 780
GFX on System #2: Intel Kaby Lake

Short description: it seems that after this monitor soft boots, DP is not functioning.

I will try to explain:
With S2417DG "Power Saving" set to On (I think this feature is called "Deep Sleep" on the sibling S2716DG):
When monitor "hard boots" (turns on, after I plug in the power cord) - image is displayed properly via DisplayPort. But then:
- Scenario 1: I turn the monitor off via the power button, then turn it on again (I call this "soft boot") - displayport is dead, black image, and "Power Saving is on" message appears. Only way to get image back is to plug the monitor mains out and back in (I call this "hard boot").
- Scenario 2: The computer puts the display to sleep, eventually the monitor enters "power saving mode" (==deep sleep) after about 10 minutes (I can see this by a wattage consumption measurement). When computer tries to wake the display, it won't wake up. Only way to get image back is to plug the monitor mains out and back in ("hard boot").

I will note that the problems described above happen when using the displayport with two complete different systems (a desktop with geforce gfx, and a laptop with intel gfx) - behavior is exactly the same.

For clarification, it seems that the "power saving" (==deep sleep) feature from the menu affects also the behavior of the monitor, when it is turned off/on via its power button. I conclude this as with "power saving" set to off - display will consume ~13watt when powered off via its power button, while with "power saving" set to on - display will consume <1watt when it is powered off via its power button.

Now, when "Power Saving" feature is set to Off - the problems described in the above scenarios do not happen, because the monitor never enters a deep sleep (not even when pressing the power button), so it never soft boots.

There are many posts in the forums with similar behavior described both in S2417DG and S2716DG. On many different revisions. But none of them referred to the same behavior when using the power button, and I don't think it was clear that this is in fact a problem with the monitor soft booting procedure.

As this is obviously a common problem, and not something specific to my monitor. I would like to ask if perhaps there is a firmware upgrade to the monitor that aims to address this issue? If so, I would be willing to try it.

Hoping to hear from you soon.

All the best
-asava